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CAMP Seminar: Nanoferronics: Creating New Functionality Utilizing the Coupling Between Charge and Spin Orders

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CAMP Seminar by Qi Li (Penn State University)
When
01 October 2013 from 3:30 PM to 4:30 PM
Where
339 Davey Laboratory
Contact Name
Contact Phone
(814) 863-9595
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Nanoferronics is a new device concept which mainly refers to combining ferroelectric based non volatile electronics with spintronics utilizing spin and charge coupling.  It is proposed as one of the alternatives to the semiconductor device which is facing increasing challenges with miniaturization, often dubbed as “beyond Moore’s law”.  In this talk, I will discuss our recent work on multiferroic tunnel junctions, i.e. magnetic tunnel junctions with ferroelectric barriers.  We have designed a new tunneling barrier which incorporates an interface with metal to insulator transition as well as ferromagnetic to antiferromagnetic phase transition in a complex oxide structures. The phase transition occurs when the ferroelectric polarization of the barrier is reversed. This has dramatically increased the tunneling electroresistance (the resistance change between the two polarization states) from 30 % to 10,000%.  This opens up other potential applications for such type of devices as an integrated multilevel component with a current switch and a magnetic memory on the same device.

Ref. Yin et al, Nature Materials 12, 397-402 (2013)

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